X.21 - Cabletron Systems CSX200 CyberSWITCH Installation Manual

Appendix A: WPIM Cable Specifications

X.21

Table A-12 shows the connector number, cable assembly description, and connector type.
Connector Number
Table A-13 provides pin assignments for the X.21 interface cable.
Connector 1 EIA-530A ALT A
DIRECT
MNEMONIC
TO
BA DCE
BB DTE
CB DTE
CA DCE
DB DTE
AC
AB
A-8
Table A-12 X.21 Interface
Cable Assembly Description
1
EIA-530A ALT A to X.21
2
Table A-13 X.21 Interface Cable Pin Assignment
NAME
Transmit Data A
Transmit Data B
Receive Data A
Receive Data B
Clear to Send A
Clear to Send B
Request to Send A
Request to Send B
Transmit Signal Timing A
Receive Signal Timing A
Transmit Signal Timing B
Receive Signal Timing B
SHIELD
DTE Common
DCE Common
PAIR
PIN PIN NAME
2 2 Transmit A
A
14 9 Transmit B
3 4 Receive A
B
16 11 Receive B
5 5 Indication A
C
13 12 Indication B
4 3 Control A
D
19 10 Control B
17 Signal Element
6
15 Timing A
E
9 Signal Element
13
12 Timing B
1
7
8 Signal Ground
23
Connector Type
Sub DB 26-pin male
DB-15 pin male
Connector 2 X.21
DIRECT
TO
DCE
DTE
DTE
DCE
DTE
DRAIN
CSX200 Installation Guide
MNEMONIC
T
R
I
C
S
G